A new coca field spreads out in the mountains of Cauca, Colombia, February 2, 2017. After aerial sprayings with glyphosate to eradicate the crop were suspended by presidential order in May 2015, Colombia has seen a dramatic increase in the crop's cultivation.
A new coca field spreads out in the mountains of Cauca, Colombia, February 2, 2017. After aerial sprayings with glyphosate to eradicate the crop were suspended by presidential order in May 2015, Colombia has seen a dramatic increase in the crop's cultivation. Carlos Villalón
A new coca field spreads out in the mountains of Cauca, Colombia, February 2, 2017. After aerial sprayings with glyphosate to eradicate the crop were suspended by presidential order in May 2015, Colombia has seen a dramatic increase in the crop's cultivation. Carlos Villalón

The U.S. spent billions fighting coca in Colombia. Why hasn't it made a dent?

May 10, 2018 08:00 AM